Because of their performance, reliable measurement and cost-effective advantages, electromagnetic flowmeters have been widely used in different industries, such as petroleum, chemical industry, and sewage treatment industry etc.
Classification of electromagnetic flowmeters
Because of their performance, reliable measurement and cost-effective advantages, electromagnetic flowmeters have been widely used in different industries, such as petroleum, chemical industry, and sewage treatment industry etc. At present, commonly used electromagnetic flowmeters can be divided into three categories. You may have questions, why do you need to come up with several types of electromagnetic flowmeters? The following editor will make an analysis and explanation of the classification of electromagnetic flowmeters for your reference.
Because industrial needs, usage conditions, and installation conditions are not necessarily all the same, in order to meet more customer needs. In fact, it is not just electromagnetic flowmeters. There are more and more types of flowmeters and non-standard products. Currently, no flowmeter can be used everywhere. The flow meter must consider the density of the medium, the flow range of the medium, the working pressure of the medium, the corrosiveness of the medium, etc.
1. Split-type electromagnetic flowmeter
This type of flowmeter measures the conductive medium in the pipe based on a certain induction principle, mainly using the technology of embedded microcontroller. . In addition, the CAN field bus is used in the electromagnetic flowmeter, and its technology has reached the highest level. The split electromagnetic flowmeter can also process current signals for statistics and adjustment. It has been widely used in chemical industry, metallurgy, papermaking and other industries.
2. Integrated electromagnetic flowmeter
The principle of this type of flowmeter is the same as that of the split electromagnetic flowmeter, and it can be used to measure the volume flow of conductive fluids. Because its performance is so precise, it is now possible to perform measurements on different industrial conductive liquids.
3. Insertion-type electromagnetic flowmeter
The principle of the insertion-type electromagnetic flowmeter is the same, and it is also based on Faraday’s law of electromagnetic induction. When the conductive liquid moves in the magnetic field to cut the magnetic lines of force, the conductor generates Induced potential, the induced electric potential E is: E=KBVD In the formula, K instrument constant, B magnetic induction intensity, V measures the average flow velocity in the pipe section, and D measures the inner diameter of the pipe section. When measuring flow, the conductive liquid flows through a magnetic field perpendicular to the flow direction at a speed V. The flow of the conductive liquid induces a voltage proportional to the average flow rate. The induced voltage signal is in direct contact with the liquid through two or more The electrodes are detected and sent to the converter through cables for intelligent processing, and then LCD display or conversion into standard signals 4-20mA and 0-1KHz output.
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